trigger AccountOwnerChangeTrigger on Account_Owner_Change__c (before update) {
    if (Trigger.isBefore && Trigger.isUpdate) {
        ChangeRelatedOwnerHandler.changeOwner(Trigger.new, Trigger.oldMap);
    }
    // if (Trigger.isAfter && Trigger.isDelete) {
    //     ChangeRelatedOwnerHandler.releaseProcessLock(Trigger.old);
    // }
}